Support-free suspension plate type explosion-proof wave valve

Abstract

The utility model relates to a support-free suspension plate type explosion-proof wave valve, and belongs to the technical field of underground civil air defense engineering. The device specifically comprises a door frame structure, the door frame structure is rotatably connected with a valve structure, the door frame structure is obliquely arranged, and the valve structure is in a vertical position in a non-closed state; the door frame structure comprises a door frame body, an opening in the middle of the door frame body is used for being matched with the valve structure for sealing, the periphery of the door frame structure extends outwards to be provided with embedded steel bar hooks, and the embedded steel bar hooks are used for being embedded in a wall. The valve structure comprises a door plate body, the outer side face of the door plate body extends towards the periphery to be provided with a sealing plate, the peripheral size of the sealing plate is larger than that of a middle opening of a door frame body, and after the door plate body is closed, the sealing plate can completely cover the middle opening of the door frame body. The door frame structure and the valve structure can naturally keep a distance to achieve ventilation, structural damage is reduced, uninterrupted ventilation in wartime can be kept, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to a supportless suspended plate type explosion-proof wave valve, belonging to the field of underground civil defense engineering technology. Background Technology

[0002] Blast wave shielding doors in underground civil defense projects are a type of protective ventilation equipment. They absorb and dissipate blast waves during air raids, ensuring uninterrupted ventilation within the civil defense structure during wartime. The design principle of blast wave shielding doors is based on the fact that when an blast wave reaches the ventilation shaft of the civil defense project, the door automatically closes, preventing the wave from entering the structure and thus protecting the internal ventilation equipment and personnel. Based on different wave-dissipation methods, blast wave shielding doors are mainly divided into two types: suspended plate type and hose type.

[0003] Suspended-plate blast-proof doors typically employ springs to support the movable door body outwards for ventilation. For example, Chinese utility model patent CN206753385U discloses a suspended-plate blast-proof door and wave-damping system, including a door leaf, at least one set of ventilation holes on the door leaf, a door device for covering the ventilation hole set along the side of the door leaf closest to the outside, and a retractable limiting member located at the bottom of the door device and connected to the door leaf to limit the opening angle of the door device. The door device is used to cover the ventilation hole set when a shock wave is generated, preventing the shock wave from entering the cavern. The retractable limiting member is located on the side of the door leaf closest to the outside, with one end connected to the bottom of the door device and the other end connected to the door leaf. The retractable limiting member can extend and retract away from the door leaf. The door device, connected to the retractable limiting member, compresses the retractable limiting member to cover the ventilation hole set, thereby blocking the shock wave outside the cavern.

[0004] The aforementioned prior art has the following technical problems:

[0005] 1. Ventilation is achieved by supporting the valve device with a telescopic limiter. The telescopic limiter is usually made of spring. As the service time increases, the performance of the telescopic limiter gradually declines, and the distance that the telescopic limiter supports the valve device to open decreases, thus weakening the ventilation effect.

[0006] 2. If an explosion shock wave occurs, the valve device will close by forcefully squeezing the spring, which will have a large impact on the telescopic limit component and cause some damage. The telescopic limit component is easily damaged, and it is not convenient to repair after the shock wave occurs, which is not conducive to maintaining continuous ventilation and may even lead to a lack of ventilation. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a supportless suspension plate type explosion-proof valve. The door frame structure and the valve structure can naturally maintain a distance to achieve ventilation, reduce structural damage, maintain uninterrupted ventilation during wartime, and extend service life.

[0008] The unsupported suspended plate type explosion-proof valve of this utility model includes a door frame structure, which is rotatably connected to the valve structure. The door frame structure is arranged at an angle, and the valve structure is in a vertical position when not closed. The door frame structure includes a door frame body with an opening in the middle for sealing with the valve structure. A pre-embedded steel bar hook extends outward from the outer periphery of the door frame body and is embedded in the wall. The valve structure includes a door panel body with a sealing plate extending outward from the outer side of the door panel body. The outer periphery of the sealing plate is larger than the size of the opening in the middle of the door frame body. When the door panel body is closed, the sealing plate can completely cover the opening in the middle of the door frame body.

[0009] Work process:

[0010] Construction: After the wall reinforcement is tied and fixed, the door frame body is placed in the corresponding position of the wall reinforcement reserved opening and fixed. Embedded steel hooks are welded to the outer perimeter of the door frame body. The wall formwork is erected, the position of the door frame body is corrected, the concrete wall is poured, and condensation curing is performed.

[0011] Installation: Connect the valve structure to the door frame. The valve structure can rotate relative to the door frame. The sealing plate completely covers the opening in the middle of the door frame body to ensure a good seal.

[0012] Usage: In the event of an explosion or air raid, the blast shockwave will push the main body of the door panel to close, and the main body of the door panel will press against the opening in the middle of the main body of the door frame. The sealing plate will completely cover the opening in the middle of the main body of the door frame and press it tightly against the main body of the door frame to achieve a seal, preventing the blast shockwave from entering the underground civil defense shelter space and preventing personnel or materials from being impacted by the blast shockwave.

[0013] The outer top surface of the door frame body is rotatably connected to the door panel body via a dual-axis rotary connection assembly. The dual-axis rotary connection assembly includes two parallel first and second connecting shafts. The two ends of the first and second connecting shafts are connected by a rotary connecting block. The first connecting shaft is connected to the door frame body via a door frame ear seat, and the second connecting shaft is connected to the door panel body via a door panel ear seat. Both the first and second connecting shafts are rotatable. There are two rotating shafts between the door frame body and the door panel body, which can adjust the rotation angle of the door panel body relative to the door frame body, so that the door panel body can be pushed forward to complete the closing in an approximately parallel state relative to the door frame body.

[0014] Furthermore, the two ends of the rotating connecting block are respectively inserted into the door frame ear seat and the door panel ear seat. The first connecting shaft passes through the rotating connecting block and the door frame ear seat and is provided with a first stop block. The second connecting shaft passes through the rotating connecting block and the door panel ear seat and is provided with a second stop block. This prevents the first and second connecting shafts from falling off during operation.

[0015] Furthermore, a bent limiting baffle extends inward from the inner side of the main body of the door panel. When the main body of the door panel is in the open state, the limiting baffle is inside the main body of the door frame. The limiting baffle can also serve as a guide to ensure that in the event of an explosion or air raid, the shock wave of the explosion can quickly push the main body of the door panel into the main body of the door frame, thereby closing the unsupported suspended plate blast wave hazard door and preventing the shock wave of the explosion from entering the underground civil defense project.

[0016] A limit groove is provided at the bottom of the main body of the door frame, and a limit adjustment block is provided in the limit groove. The limit adjustment block and the limit baffle cooperate to limit the door structure and prevent the door structure from reopening after it is closed. In the event of an explosion or air raid, the shock wave of the explosion can push the main body of the door panel into the main body of the door frame quickly. The limit baffle is pushed in at the same time. The limit baffle presses the limit adjustment block down into the limit groove. After the limit baffle passes the limit adjustment block, the limit adjustment block resets and limits the limit baffle to prevent the main body of the door panel from reopening after it is closed.

[0017] The limiting adjustment block includes a limiting block with a limiting inclined surface. The limiting inclined surface is corresponding to a limiting baffle. A portion of the limiting inclined surface extends out of the limiting groove. A spring is located at the bottom of the limiting block, and a slider is located at the bottom of the spring. An adjusting base is located at the bottom of the slider. The contact surface between the slider and the adjusting base is a sliding inclined surface that cooperates with each other. A screw is installed through the adjusting base, and the screw is rotatably limited by the adjusting base. The screw is located below the sliding inclined surface and is threadedly connected to the door frame body. In the event of an explosion or air raid, the shock wave from the explosion will force the door panel body to be quickly pushed into the door frame body. The limiting baffle is pushed in synchronously. After the limiting baffle contacts the sliding inclined plane, the limiting baffle continues to push the sliding inclined plane until the limiting baffle passes the limiting block. The spring pushes the limiting block to reset, and the limiting block limits the limiting baffle to prevent the door panel from opening. After the explosion shock wave dissipates, when it is necessary to open the door structure, the screw is rotated. The screw is threaded with the door frame body, and the screw rotates out of the door frame body, driving the adjusting base to exit. The slider slides down relative to the adjusting base, and the limiting block moves down. After the limiting block is fully inserted into the limiting groove, the door panel body resets to the vertical downward state, and the limiting baffle is still located inside the door frame body.

[0018] Furthermore, an upper baffle is provided around the sliding slope of the adjusting base to form a sliding cavity. The sliding cavity is used to limit the slider and prevent the slider from detaching from the adjusting base.

[0019] Preferably, a lower baffle is provided around the periphery of the sliding slope of the slider to form a rolling cavity, and a ball bearing is provided inside the rolling cavity; this effectively reduces friction and simplifies operation.

[0020] Furthermore, a limit ring is fixed on the screw, and a limit sealing plate surrounds the limit ring and connects to the adjustment base.

[0021] Preferably, corresponding to the limiting baffle, a limiting sealing plate is provided at the bottom of the door frame body facing upward. The limiting sealing plate and the limiting baffle cooperate to seal. At the same time, when the explosive shock wave compresses the door panel body and pushes it into the door frame body, the sealing plate covers the opening in the middle of the door frame body and presses against the door frame body to complete the seal. The sealing plate withstands a very large impact force. By setting a lower limiting sealing plate, while the limiting sealing plate and the limiting baffle cooperate to seal, a part of the impact force can be unloaded to ensure the sealing effect and reduce the probability of overall damage to the door structure.

[0022] Preferably, an operating handle is provided at the outer end of the screw; this makes operation convenient.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. This utility model features an inclined door frame with pre-embedded reinforcing bars hooked into the wall. When the door panel is open, it remains vertical due to gravity. In the event of an blast shockwave, the door panel is compressed upwards and pressed tightly against the door frame, preventing the shockwave from entering the underground civil defense structure. Normally, the unsupported door panel effectively maintains ventilation and is unaffected by external pressure or damage, thus extending its service life.

[0025] 2. By setting a double-row rotating connection mode, both the first and second connecting shafts can rotate. There are two rotating shafts between the door frame body and the door panel body. Moreover, the rotation angle of the door panel body relative to the door frame body can be adjusted, achieving a near-parallel closing state for the door panel body to advance and complete the closure. This closing mode allows for greater enclosure of the door panel by the door frame body. In other words, the size of the door panel body can be almost equal to the opening in the middle of the door frame body, and the size of the door panel body only needs to be slightly smaller than the inner size of the door frame body. This achieves a better sealing state. Combined with a limiting baffle located inside the door frame body, and the limiting baffle working in conjunction with the limiting adjustment block, this results in better and more reliable door closing.

[0026] 3. By setting limit baffles and limit adjustment blocks, in the event of an explosion or air raid, the shock wave from the explosion will force the door panel body to be quickly pushed into the door frame body. The limit baffle will be pushed in simultaneously. After the limit baffle contacts the sliding ramp, it will continue to push the sliding ramp until the limit baffle passes the limit block. The spring will then push the limit block to reset, and the limit block will limit the limit baffle to prevent the door panel body from opening, ensuring that the door panel body is successfully closed and that the shock wave from the explosion cannot enter the underground civil defense project. After the shock wave from the explosion dissipates, when it is necessary to open the trapdoor structure, the screw will be rotated. The screw will be threaded into the door frame body, and the screw will rotate out of the door frame body, causing the adjustment base to retract. The slider will slide down relative to the adjustment base, and the limit block will move down. After the limit block is fully inserted into the limit groove, the door panel body will reset to a vertically downward position, and the limit baffle will remain inside the door frame body, maintaining ventilation. Attached Figure Description

[0027] Figure 1 This is one of the three-dimensional structural schematic diagrams of an embodiment of the present utility model;

[0028] Figure 2 This is a second three-dimensional structural schematic diagram of an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the pre-embedded wall structure according to an embodiment of the present invention;

[0030] Figure 4 This is a partially enlarged structural schematic diagram of a dual-axis rotary connection assembly in one embodiment of the present invention;

[0031] Figure 5 This is a cross-sectional structural schematic diagram of an embodiment of the present invention;

[0032] Figure 6 yes Figure 5 Enlarged structural diagram at point A in the middle;

[0033] Figure 7 yes Figure 5 Enlarged structural diagram at point B;

[0034] Figure 8 This is a three-dimensional structural diagram of the closed state of the valve structure according to an embodiment of the present invention;

[0035] Figure 9 This is a schematic cross-sectional view of the closed state of a valve structure according to an embodiment of this utility model;

[0036] Figure 10 This is a schematic diagram of the three-dimensional structure of the limit adjustment block in one embodiment of this utility model.

[0037] In the diagram: 1. Door frame structure; 2. Door structure; 3. Dual-axis rotating connection assembly; 4. Limit adjustment block; 5. Wall;

[0038] 11. Door frame body; 12. Limiting sealing plate; 13. Limiting groove; 14. Embedded steel bar hook;

[0039] 21. Door panel body; 22. Limiting baffle; 23. Sealing plate;

[0040] 31. Door frame ear seat; 32. First connecting shaft; 33. Rotary connecting block; 34. Second connecting shaft; 35. Second stop block; 36. First stop block; 37. Door panel ear seat;

[0041] 41. Limit block; 42. Spring; 43. Slider; 44. Adjusting base; 45. Screw; 46. Operating handle; 47. Ball bearing; 48. Upper baffle; 49. Lower baffle;

[0042] 410. Limiting inclined plane;

[0043] 441. Limiting and sealing plate;

[0044] 451. Limiting ring. Detailed Implementation Example

[0045] Reference Figures 1-10 As shown, one embodiment of the unsupported suspension plate type explosion-proof valve of this utility model includes a door frame structure 1, which is rotatably connected to a valve structure 2. The door frame structure 1 is arranged at an angle, and the valve structure 2 is in a vertical position under the action of gravity when it is not closed. The valve structure can be in an open state relative to the door frame structure without support, thus maintaining ventilation. Both the door frame structure and the valve structure are made of steel.

[0046] Reference Figures 1-5 as well as Figures 8-9As shown, the top outer side of the door frame body 11 is rotatably connected to the door panel body 21 via a dual-axis rotary connecting assembly 3. The dual-axis rotary connecting assembly 3 includes two parallel first connecting shafts 32 and second connecting shafts 34. The two ends of the first connecting shafts 32 and second connecting shafts 34 are connected by a rotary connecting block 33. The first connecting shaft 32 is connected to the door frame body 11 via a door frame ear seat 31, and the second connecting shaft 34 is connected to the door panel body 21 via a door panel ear seat 37. The two ends of the rotary connecting block 33 are respectively inserted into the door frame ear seat 31 and the door panel ear seat 37. The first connecting shaft 32 passes through the rotary connecting block 33 and the door frame ear seat 31 and is provided with a first stop 36. The second connecting shaft 34 passes through the rotary connecting block 33 and the door panel ear seat 37 and is provided with a second stop 35. Both the first connecting shaft and the second connecting shaft can rotate. There are two rotating shafts between the door frame body and the door panel body. Moreover, the rotation angle of the door panel body relative to the door frame body can be adjusted to achieve a state where the door panel body is approximately parallel to the door frame body, thus allowing the door to be closed. This closing mode allows for greater containment of the door panel by the door frame. In other words, by adopting this closing mode, the door panel can be designed to be relatively thicker, which increases the strength of the door panel and effectively withstands the powerful impact of an explosion shock wave.

[0047] Furthermore, the door panel body can be designed to be larger than the opening in the middle of the door frame body. Its size can be almost equal to the opening in the middle of the door frame body, and the size of the door panel body can be slightly smaller than the inner size of the door frame body. Example

[0048] Reference Figures 1-10 As shown, based on Embodiment 1, the door structure 2 includes a door panel body 21. A bent limiting baffle 22 extends inward from the inner side of the door panel body 21. When the door panel body 21 is open, the limiting baffle 22 is located inside the door frame body 11. To ensure the limiting baffle 22 is located inside the door frame body 11, the door frame body needs to be set to an appropriate tilt angle. Simultaneously, to maintain appropriate ventilation, the limiting baffle also needs to be designed with suitable dimensions. A sealing plate 23 extends outward from the outer side of the door panel body 21. The outer circumference of the sealing plate 23 is larger than the opening size in the middle of the door frame body 11. When the door panel body 21 is closed, the sealing plate 23 can completely cover the opening in the middle of the door frame body 11. The sealing plate 23 is integrally formed with the door panel body 21, and the limiting baffle 22 is welded to the door panel body 21.

[0049] The door frame structure 1 includes a door frame body 11. The door frame body 11 has an opening in the middle for sealing with the door structure 2. The door frame body 11 has a pre-embedded steel bar hook 14 extending outward from the outer periphery. The pre-embedded steel bar hook 14 is pre-embedded into the wall 5.

[0050] A limit groove 13 is provided at the bottom of the door frame body 11. A limit adjustment block 4 is provided in the limit groove 13. The limit adjustment block 4 cooperates with the limit baffle 22 to limit the door structure 2 and prevent the door structure 2 from opening again after it is closed.

[0051] In a further preferred embodiment, corresponding to the limiting baffle 22, a limiting sealing plate 12 is provided at the bottom of the door frame body 11, and the bottom edge and two sides of the limiting sealing plate 12 are welded to the door frame body 11.

[0052] Reference Figure 5 , Figure 7 and Figure 10 As shown, the limiting adjustment block 4 includes a limiting block 41, on which a limiting inclined surface 410 is provided. The limiting inclined surface 410 is set corresponding to the limiting baffle 22. A portion of the limiting inclined surface 410 of the limiting block 41 extends out of the limiting groove 13. A spring 42 is provided at the bottom of the limiting block 41, and a slider 43 is provided at the bottom of the spring 42. An adjusting base 44 is provided at the bottom of the slider 43. The contact surface between the slider 43 and the adjusting base 44 is set as a sliding inclined surface that cooperates with each other. A screw 45 is provided through the adjusting base 44, and the screw 45 is limited to the adjusting base 44 for rotation. A limiting ring 451 is fixed on the screw 45, and a limiting sealing plate 441 surrounds the limiting ring 451 and connects to the adjusting base 44. The screw 45 is located below the sliding inclined surface and is threadedly connected to the door frame body 11.

[0053] An upper baffle 48 is provided around the sliding inclined surface of the adjusting base 44 to form a sliding cavity, which is used to limit the slider 43 and prevent the slider 43 from disengaging from the adjusting base 44. A lower baffle 49 is provided around the sliding inclined surface of the slider 43 to form a rolling cavity, and a ball bearing 47 is provided inside the rolling cavity. An operating handle 46 is provided at the outer end of the screw 45.

[0054] Typically, the limit adjustment block 4 can be made of steel.

[0055] The construction and installation method of the unsupported suspension plate type explosion-proof wave valve includes the following steps:

[0056] S1. After the wall reinforcement is tied and fixed, place the main body of the door frame into the corresponding position of the reserved opening of the wall reinforcement and fix it. Weld the embedded steel hooks around the outer perimeter of the main body of the door frame, set up the wall formwork, and correct the position of the main body of the door frame.

[0057] S2. Concrete-poured walls, condensation curing;

[0058] S3. After assembling the limit block, spring and slider, weld them in place and then place them in the limit groove. Push the adjusting base into the corresponding limit groove from one side. After assembling the slider and adjusting base, rotate the screw to push the adjusting base forward and adjust the limit block to a suitable height.

[0059] S4. After the rotating connecting block is inserted into the door frame ear seat, the first connecting shaft is inserted and the first stop blocks are installed at both ends of the first connecting shaft; the door panel ear seat is inserted into the other end of the rotating connecting block, and the second connecting shaft is inserted and the second stop blocks are installed at both ends of the second connecting shaft; adjust the position of the door panel body so that the limiting baffle is located inside the door frame body.

[0060] Working process or working principle:

[0061] In the event of an explosion or air raid, the shockwave will force the door panel to quickly push into the central opening of the door frame. Simultaneously, a limiting baffle will be pushed in. After contacting the sliding ramp, the limiting baffle will continue to push the sliding ramp until it passes the limiting block. A spring will then push the limiting block back to its original position, preventing the door panel from opening. The sealing plate will completely cover the central opening of the door frame, pressing it firmly to achieve a seal and prevent the shockwave from entering the underground air-raid shelter, thus protecting personnel and materials from the impact of the shockwave.

[0062] After the shockwave from the explosion dissipates, when it is necessary to open the hatch structure, the screw is rotated. The screw engages with the door frame body via a thread, causing the screw to rotate out of the door frame body. This pulls the adjusting base out of the frame, causing the slider to slide down relative to the adjusting base. The limiting block moves down, and after the limiting block fully enters the limiting groove, the door panel body returns to a vertically downward position, with the limiting baffle still located within the door frame body. The descriptions of the structural directions and relative positions in this invention, such as descriptions of front, back, left, right, up, and down, do not constitute limitations on this invention and are merely for descriptive convenience.

Claims

1. A supportless suspension plate type explosion-proof wave valve, characterized in that, It includes a door frame structure (1), a door frame structure (1) that can be rotatably connected to a door structure (2), a door frame structure (1) arranged at an angle, and a door structure (2) in a vertical position when not closed; The door frame structure (1) includes a door frame body (11), the middle of the door frame body (11) is open for sealing with the door structure (2), and the outer periphery of the door frame body (11) is provided with a pre-embedded steel bar hook (14), which is used to be pre-embedded in the wall (5); The door structure (2) includes a door panel body (21). A sealing plate (23) is provided on the outer side of the door panel body (21) facing outward. The outer periphery of the sealing plate (23) is larger than the opening size in the middle of the door frame body (11). After the door panel body (21) is closed, the sealing plate (23) can completely cover the opening in the middle of the door frame body (11).

2. The unsupported suspension plate type explosion-proof wave valve according to claim 1, characterized in that, The top outer side of the door frame body (11) is rotatably connected to the door panel body (21) via a dual-axis rotating connection assembly (3). The dual-axis rotating connection assembly (3) includes two parallel first connecting shafts (32) and second connecting shafts (34). The two ends of the first connecting shafts (32) and second connecting shafts (34) are connected by rotating connecting blocks (33). The first connecting shaft (32) is connected to the door frame body (11) through the door frame ear seat (31), and the second connecting shaft (34) is connected to the door panel body (21) through the door panel ear seat (37).

3. The unsupported suspension plate type explosion-proof wave valve according to claim 2, characterized in that, The two ends of the rotating connecting block (33) are respectively inserted into the door frame ear seat (31) and the door panel ear seat (37). The first connecting shaft (32) passes through the rotating connecting block (33) and the door frame ear seat (31) and is provided with a first stop (36). The second connecting shaft (34) passes through the rotating connecting block (33) and the door panel ear seat (37) and is provided with a second stop (35).

4. The unsupported suspension plate type explosion-proof wave valve according to any one of claims 1-3, characterized in that, A bent limiting baffle (22) extends inward from the inner side of the door panel body (21). When the door panel body (21) is in the open state, the limiting baffle (22) is inside the door frame body (11). A limit groove (13) is provided at the bottom of the main body of the door frame (11). A limit adjustment block (4) is provided in the limit groove (13). The limit adjustment block (4) and the limit baffle (22) cooperate to limit the door structure (2) to prevent the door structure (2) from opening again after it is closed.

5. The unsupported suspension plate type explosion-proof wave valve according to claim 4, characterized in that, The limiting adjustment block (4) includes a limiting block (41), a limiting inclined surface (410) is provided on the limiting block (41), the limiting inclined surface (410) is set to correspond to the limiting baffle (22), a part of the limiting inclined surface (410) of the limiting block (41) extends out of the limiting groove (13), a spring (42) is provided at the bottom of the limiting block (41), a slider (43) is provided at the bottom of the spring (42), an adjusting base (44) is provided at the bottom of the slider (43), the contact surface of the slider (43) and the adjusting base (44) is set to a sliding inclined surface that cooperates with each other, a screw (45) is provided through the adjusting base (44), the screw (45) is set to limit the rotation of the adjusting base (44); the screw (45) is located below the sliding inclined surface, and the screw (45) is threadedly connected to the door frame body (11).

6. The unsupported suspension plate type explosion-proof wave valve according to claim 5, characterized in that, An upper baffle (48) is provided around the sliding slope of the adjusting base (44) to form a sliding cavity. The sliding cavity is used to limit the slider (43) and prevent the slider (43) from separating from the adjusting base (44).

7. The unsupported suspension plate type explosion-proof wave valve according to claim 6, characterized in that, The sliding slope of the slider (43) is surrounded by a lower baffle (49) to form a rolling cavity, and a ball (47) is provided inside the rolling cavity.

8. The unsupported suspension plate type explosion-proof wave valve according to claim 7, characterized in that, A limit ring (451) is fixed on the screw (45), and a limit sealing plate (441) surrounds the limit ring (451) and connects to the adjusting base (44).

9. The unsupported suspension plate type explosion-proof wave valve according to claim 8, characterized in that, Corresponding to the limiting baffle (22), the bottom of the door frame body (11) is provided with a limiting sealing plate (12) facing upward.

10. The unsupported suspension plate type explosion-proof wave valve according to claim 9, characterized in that, An operating handle (46) is provided at the outer end of the screw (45).

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